package com.example.demo;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.lang.reflect.Array;
import java.util.Arrays;

@RestController
@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }

    @RequestMapping("/")
    String home() {
        return "你好 Spring Boot！";
    }
    @Bean
    public CommandLineRunner commandLineRunner(ApplicationContext ctx){
        return args -> {
            System.out.println("由Spring Boot 注册的所有Bean:");
            String[] beanNames= ctx.getBeanDefinitionNames();
            Arrays.sort(beanNames);
            for (String beanName : beanNames){
                System.out.println(beanName);
            }
        };
    }
}
